/* ========================================
   ForAll Sense — Styles
   Dark, cinematic, scroll-driven
   ======================================== */

:root {
  --bg:       #121315;
  --bg-card:  rgba(18,19,21,0.92);
  --amber:    #FFBF00;
  --amber-dim:rgba(255,191,0,0.12);
  --text:     #E3E2E3;
  --muted:    #9A9590;
  --green:    #4ADE80;
  --red:      #F87171;
  --warn:     #FBBF24;
  --font:     'DM Sans', -apple-system, BlinkMacSystemFont, 'Segoe UI', sans-serif;
  --display:  'Plus Jakarta Sans', 'DM Sans', sans-serif;
}

*, *::before, *::after { box-sizing: border-box; margin: 0; padding: 0; }

html { scroll-behavior: smooth; }

body {
  background: var(--bg);
  color: var(--text);
  font-family: var(--font);
  font-weight: 400;
  line-height: 1.6;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
  overflow-x: hidden;
}

a { color: inherit; }

::selection {
  background: var(--amber);
  color: var(--bg);
}

/* ---- NAV ---- */
#nav-bar {
  position: fixed;
  top: 0; left: 0; right: 0;
  z-index: 1000;
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 1rem 2.5rem;
  background: rgba(18,19,21,0.85);
  backdrop-filter: blur(16px);
  border-bottom: 1px solid rgba(255,255,255,0.06);
}

.nav-logo {
  display: flex; align-items: center; gap: 0.6rem;
  text-decoration: none;
}
.logo-mark {
  font-family: var(--display);
  font-size: 1.6rem; font-weight: 700;
  color: var(--amber);
  line-height: 1;
  position: relative;
  top: -0.12em;
}
.logo-text {
  font-weight: 700; letter-spacing: 0.02em;
}

.nav-links {
  display: flex; align-items: center; gap: 1.5rem;
}
.nav-links a {
  font-family: var(--display);
  font-size: 0.76rem;
  font-weight: 600;
  letter-spacing: 0.12em;
  text-transform: uppercase;
  text-decoration: none;
  color: var(--muted);
  transition: color 0.2s;
}
.nav-links a:hover { color: var(--text); }

/* ---- BUTTONS ---- */
.btn {
  display: inline-flex; align-items: center; justify-content: center;
  padding: 0.7rem 1.4rem;
  border-radius: 999px;
  border: none;
  font-family: var(--display);
  font-size: 0.82rem; font-weight: 700;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  text-decoration: none;
  cursor: pointer;
  transition: transform 0.15s, background 0.2s;
}
.btn:hover { transform: translateY(-1px); }
.btn-primary,
.nav-links .btn-primary {
  background: var(--amber);
  color: #000;
}
.btn-sm { padding: 0.5rem 1rem; font-size: 0.76rem; }

/* ---- SHARED TYPOGRAPHY ---- */
.eyebrow {
  font-family: var(--display);
  font-size: 0.7rem; font-weight: 600;
  letter-spacing: 0.18em;
  text-transform: uppercase;
  color: var(--amber);
  margin-bottom: 0.8rem;
}

h2 {
  font-family: var(--display);
  font-size: clamp(2.2rem, 4.5vw, 3.6rem);
  font-weight: 700;
  line-height: 1.05;
  letter-spacing: -0.025em;
}

.sub {
  color: var(--muted);
  font-size: clamp(1rem, 1.3vw, 1.15rem);
  max-width: 32rem;
  margin-top: 1rem;
}

/* ---- HERO ---- */
#section-hero {
  position: relative;
  height: 100vh;
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  text-align: center;
  padding: 2rem;
}

#section-hero h1 {
  font-family: var(--display);
  font-size: clamp(2.8rem, 6.5vw, 5.2rem);
  font-weight: 800;
  line-height: 0.96;
  letter-spacing: -0.035em;
}

.hero-sub {
  color: var(--muted);
  font-size: clamp(1.05rem, 1.4vw, 1.2rem);
  font-weight: 400;
  margin-top: 1.4rem;
  max-width: 34rem;
  letter-spacing: 0.005em;
}

.scroll-cue {
  position: absolute;
  bottom: 2.5rem;
  display: flex; flex-direction: column; align-items: center; gap: 0.6rem;
}
.scroll-cue span:first-child {
  font-family: var(--display);
  font-size: 0.65rem;
  letter-spacing: 0.2em;
  text-transform: uppercase;
  color: rgba(255,255,255,0.35);
}
.scroll-line {
  width: 1px; height: 2.5rem;
  background: linear-gradient(to bottom, var(--amber), transparent);
  animation: pulse 2s ease-in-out infinite;
}
@keyframes pulse {
  0%, 100% { opacity: 0.3; transform: scaleY(0.6); }
  50%      { opacity: 1;   transform: scaleY(1); }
}

/* ---- DEVICE STAGE ---- */
#device-stage {
  position: fixed;
  top: 42%;
  left: 50%;
  width: min(30vw, 360px);
  transform: translate(-50%, -50%);
  z-index: 50;
  pointer-events: none;
  opacity: 0;
}

#device-stage svg { overflow: visible; }

/* Mobile-only inline spectrum (hidden on desktop) */
.mobile-spectrum { display: none; }

/* ---- SPECTRUM DISPLAY (standalone fixed element, desktop only) ---- */
#spectrum-display {
  position: fixed;
  top: 50%;
  right: 5vw;
  width: min(42vw, 520px);
  transform: translateY(-50%);
  z-index: 55;
  pointer-events: none;
  opacity: 0;
}

#spectrum-svg {
  width: 100%;
  height: auto;
  filter: drop-shadow(0 0 20px rgba(255,191,0,0.08));
}

/* ---- PINNED SECTIONS ---- */
#section-draw-in,
#section-beam,
#section-spectrum,
#section-usecases,
#section-price {
  position: relative;
  height: 100vh;
  display: flex;
  align-items: center;
  overflow: hidden;
}

/* Center text block (draw-in — sits below device) */
.section-text-block {
  position: absolute;
  bottom: 6vh;
  left: 50%;
  transform: translateX(-50%);
  width: 100%;
  max-width: 36rem;
  padding: 2rem;
  text-align: center;
  z-index: 60;
  opacity: 0; /* GSAP fades in */
}

/* Left-aligned text panel */
.pin-left {
  position: relative;
  z-index: 60;
  width: 100%;
  max-width: 26rem;
  margin-left: max(3vw, calc((100vw - 1100px) / 2 + 1rem));
  padding: 2rem 2rem;
  background: rgba(18,19,21,0.92);
  border-radius: 1.2rem;
  border: 1px solid rgba(255,255,255,0.06);
  backdrop-filter: blur(8px);
}

.pin-left h2 {
  font-size: clamp(1.7rem, 3vw, 2.6rem);
}

/* Initially hidden — GSAP fades these in during their scroll timelines */
#section-beam .pin-left,
#section-spectrum .pin-left,
#section-usecases .pin-left {
  opacity: 0;
}

/* ---- QUAL/QUANT CARDS ---- */
.qual-quant {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 1rem;
  margin-top: 1.5rem;
}
.qq-item {
  padding: 1rem;
  background: var(--bg-card);
  border: 1px solid rgba(255,255,255,0.06);
  border-radius: 0.8rem;
}
.qq-label {
  font-family: var(--display);
  font-size: 0.7rem; font-weight: 700;
  letter-spacing: 0.12em;
  text-transform: uppercase;
  color: var(--amber);
}
.qq-item p {
  color: var(--muted);
  font-size: 0.92rem;
  margin-top: 0.3rem;
}

/* ---- USE CASE ITEMS ---- */
.usecase-item {
  padding: 1.2rem 1.5rem;
  margin-bottom: 1rem;
  background: var(--bg-card);
  border: 1px solid rgba(255,255,255,0.06);
  border-radius: 0.8rem;
  opacity: 0;
  transform: translateY(12px);
}
.usecase-item h3 {
  font-size: 1.15rem;
  margin: 0.4rem 0 0.3rem;
}
.usecase-item p {
  color: var(--muted);
  font-size: 0.92rem;
}

.uc-tag {
  display: inline-block;
  padding: 0.2rem 0.6rem;
  border-radius: 999px;
  font-family: var(--display);
  font-size: 0.7rem; font-weight: 700;
  letter-spacing: 0.1em;
}
.uc-tag.pass {
  background: rgba(74,222,128,0.12);
  border: 1px solid rgba(74,222,128,0.3);
  color: var(--green);
}
.uc-tag.fail {
  background: rgba(248,113,113,0.12);
  border: 1px solid rgba(248,113,113,0.3);
  color: var(--red);
}
.uc-tag.warn {
  background: rgba(251,191,36,0.12);
  border: 1px solid rgba(251,191,36,0.3);
  color: var(--warn);
}

/* ---- PRICE ---- */
#section-price {
  justify-content: center;
  z-index: 55;
}
.price-block {
  text-align: center;
  max-width: 48rem;
  padding: 2rem;
  opacity: 0; /* GSAP fades in during price pin */
}
.price-compare {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 2.5rem;
  margin: 2rem 0 1.5rem;
}
.price-old .price-num {
  font-family: var(--display);
  font-size: clamp(2rem, 4vw, 3.2rem);
  font-weight: 700;
  color: rgba(255,255,255,0.3);
  text-decoration: line-through;
}
.price-new .price-num {
  font-family: var(--display);
  font-size: clamp(3rem, 6vw, 5rem);
  font-weight: 700;
  color: var(--amber);
}
.price-label {
  display: block;
  font-family: var(--display);
  font-size: 0.72rem; font-weight: 600;
  letter-spacing: 0.12em;
  text-transform: uppercase;
  color: var(--muted);
  margin-bottom: 0.5rem;
}
.price-arrow {
  font-size: 2rem;
  color: rgba(255,255,255,0.25);
}
.price-block .sub {
  margin: 0 auto;
  text-align: center;
}

/* ---- SCIENCE + FOUNDERS ---- */
#section-science {
  position: relative;
  z-index: 60;
  padding: clamp(4rem, 8vw, 7rem) clamp(1.5rem, 3vw, 2.5rem);
  background: var(--bg);
}

.science-content {
  max-width: 1000px;
  margin: 0 auto;
}

.science-top {
  margin-bottom: 3rem;
}

.paper-links {
  display: flex; flex-direction: column; gap: 0.6rem;
  margin-top: 1.5rem;
}
.paper-link {
  display: inline-flex; align-items: center; gap: 0.5rem;
  padding: 0.6rem 1rem;
  background: var(--bg-card);
  border: 1px solid rgba(255,255,255,0.06);
  border-radius: 0.6rem;
  text-decoration: none;
  color: var(--muted);
  font-size: 0.88rem;
  transition: border-color 0.2s;
}
.paper-link:hover { border-color: var(--amber); color: var(--text); }
.paper-tag {
  font-family: var(--display);
  font-size: 0.65rem; font-weight: 700;
  letter-spacing: 0.1em;
  text-transform: uppercase;
  color: var(--amber);
  flex-shrink: 0;
}

.founders-row {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 1.5rem;
  margin-bottom: 2rem;
}
.founder {
  padding: 1.5rem;
  background: var(--bg-card);
  border: 1px solid rgba(255,255,255,0.06);
  border-radius: 1rem;
}
.founder-role {
  font-family: var(--display);
  font-size: 0.7rem; font-weight: 700;
  letter-spacing: 0.12em;
  text-transform: uppercase;
  color: var(--amber);
}
.founder h3 {
  font-size: 1.3rem;
  margin: 0.3rem 0 0.5rem;
}
.founder p {
  color: var(--muted);
  font-size: 0.92rem;
}

.institutions {
  text-align: center;
  color: var(--muted);
  font-size: 0.9rem;
}

/* ---- WAITLIST ---- */
#section-waitlist {
  position: relative;
  z-index: 60;
  padding: clamp(4rem, 8vw, 6rem) clamp(1.5rem, 3vw, 2.5rem);
  background: var(--bg);
  text-align: center;
}

.waitlist-content {
  max-width: 600px;
  margin: 0 auto;
}

.waitlist-content h2 {
  margin-bottom: 2rem;
}

.form-row {
  display: flex;
  gap: 0.75rem;
  margin-bottom: 1rem;
}

.form-row input[type="email"] {
  flex: 1;
  padding: 0.75rem 1rem;
  border-radius: 999px;
  border: 1px solid rgba(255,255,255,0.12);
  background: rgba(0,0,0,0.4);
  color: var(--text);
  font-size: 1rem;
  font-family: var(--font);
}
.form-row input::placeholder {
  color: rgba(255,255,255,0.3);
}

#form-status {
  color: var(--muted);
  font-size: 0.85rem;
  min-height: 1.2rem;
}

.success-msg {
  color: var(--green);
  font-size: 1.1rem;
  font-weight: 600;
}

/* ---- FOOTER ---- */
#footer {
  padding: 2rem 2.5rem;
  border-top: 1px solid rgba(255,255,255,0.06);
  text-align: center;
}
.footer-inner {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 0.6rem;
  flex-wrap: wrap;
  color: var(--muted);
  font-size: 0.82rem;
}
.footer-mark {
  font-family: var(--display);
  font-size: 1.2rem;
  font-weight: 700;
  color: var(--amber);
}
.footer-sep { opacity: 0.3; }
#footer a {
  text-decoration: none;
  transition: color 0.2s;
}
#footer a:hover { color: var(--text); }

/* ---- RESPONSIVE ---- */
@media (max-width: 900px) {
  #nav-bar {
    padding: 0.8rem 1.2rem;
  }
  .nav-links { gap: 1rem; }
  .nav-links a:not(.btn) { display: none; }

  #device-stage {
    position: relative;
    top: auto; left: auto;
    width: 70vw; max-width: 280px;
    margin: 2rem auto;
    transform: none;
    opacity: 1 !important;
  }
  #spectrum-display { display: none; }

  .mobile-spectrum {
    display: block !important;
    width: 100%;
    margin: 1.5rem 0 0;
  }

  #section-draw-in,
  #section-beam,
  #section-spectrum,
  #section-usecases,
  #section-price {
    height: auto;
    min-height: auto;
    padding: 3rem 1.2rem;
  }

  .pin-left {
    margin-left: 0;
    max-width: 100%;
    background: none;
    border: none;
    padding: 0;
    opacity: 1 !important;
  }

  .section-text-block,
  .price-block,
  .usecase-item {
    opacity: 1 !important;
    transform: none !important;
  }

  .qual-quant {
    grid-template-columns: 1fr;
  }

  .price-compare {
    flex-direction: column;
    gap: 1rem;
  }
  .price-arrow {
    transform: rotate(90deg);
  }

  .founders-row {
    grid-template-columns: 1fr;
  }

  .form-row {
    flex-direction: column;
  }
}

@media (max-width: 640px) {
  #section-hero h1 {
    font-size: 2.4rem;
  }
  .btn { width: 100%; }
}

@media (prefers-reduced-motion: reduce) {
  html { scroll-behavior: auto; }
  .scroll-line { animation: none; }
  .usecase-item, .pin-left, .section-text-block, .price-block {
    opacity: 1 !important;
    transform: none !important;
  }
}